Common Polyatomic Ions

A comprehensive vocabulary review of common polyatomic anions and cations along with their chemical formulas and charges.

Acetate

$$\text{CH}_3\text{COO}^-$$

Benzoate

$$\text{C}_6\text{H}_5\text{COO}^-$$

Bromate

$$\text{BrO}_3^-$$

Chlorate

$$\text{ClO}_3^-$$

Chlorite

$$\text{ClO}_2^-$$

Cyanate

$$\text{OCN}^-$$

Cyanide

$$\text{CN}^-$$

Dihydrogen phosphate

$$\text{H}_2\text{PO}_4^-$$

Hydrogen carbonate (bicarbonate)

$$\text{HCO}_3^-$$

Hydrogen sulfate (bisulfate)

$$\text{HSO}_4^-$$

Hydroxide

$$\text{OH}^-$$

Hypochlorite

$$\text{ClO}^-$$

iodate

$$\text{IO}_3^-$$

Nitrate

$$\text{NO}_3^-$$

Nitrite

$$\text{NO}_2^-$$

Perchlorate

$$\text{ClO}_4^-$$

Permanganate

$$\text{MnO}_4^-$$

Thiocyanate

$$\text{SCN}^-$$

Vanadate

$$\text{VO}_3^-$$

Carbonate

$$\text{CO}_3^{2-}$$

Chromate

$$\text{CrO}_4^{2-}$$

Dichromate

$$\text{Cr}_2\text{O}_7^{2-}$$

Manganate

$$\text{MnO}_4^{2-}$$

Metasilicate

$$\text{SiO}_3^{2-}$$

Monohydrogen phosphate

$$\text{HPO}_4^{2-}$$

Oxalate

$$\text{C}_2\text{O}_4^{2-}$$

Peroxide

$$\text{O}_2^{2-}$$

Peroxydisulfate

$$\text{S}_2\text{O}_8^{2-}$$

Phthalate

$$\text{C}_8\text{H}_4\text{O}_4^{2-}$$

Selenate

$$\text{SeO}_4^{2-}$$

Sulfate

$$\text{SO}_4^{2-}$$

Sulfite

$$\text{SO}_3^{2-}$$

Tartrate

$$\text{C}_4\text{H}_4\text{O}_6^{2-}$$

Tellurate

$$\text{TeO}_4^{2-}$$

Tetraborate

$$\text{B}_4\text{O}_7^{2-}$$

Thiosulfate

$$\text{S}_2\text{O}_3^{2-}$$

Tungstate

$$\text{WO}_4^{2-}$$

Zincate

$$\text{ZnO}_2^{2-}$$

Aluminate

$$\text{AlO}_3^{3-}$$

Arsenate

$$\text{AsO}_4^{3-}$$

Borate

$$\text{BO}_3^{3-}$$

Citrate

$$\text{C}_6\text{H}_5\text{O}_7^{3-}$$

Phosphate

$$\text{PO}_4^{3-}$$

Phosphite

$$\text{PO}_3^{3-}$$

Orthosilicate

$$\text{SiO}_4^{4-}$$

Pyrophosphate

$$\text{P}_2\text{O}_7^{4-}$$

Tripolyphosphate

$$\text{P}_3\text{O}_{10}^{5-}$$

Ammonium

$$\text{NH}_4^+$$

Hydronium

$$\text{H}_3\text{O}^+$$